Shot shells

Or whatever you want to call it. A pistol cartridge loaded with pellets, akin to shotgun shells. In any case my G22 has had thousands of rounds shot through it and never a hiccup. That is until recently, just for giggles I pulled the trigger (hate that term) on a couple of CCI shot shells and had a failure to fully eject. Have shot every kind of ammo through the gun I could ever find and this was the first issue.

Just wondering and I suspect it is because of the lack of grains (80)?...

Shot shells